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EP3036034B1 - Reaktor mit einer plasmaquelle und einem katalysator mit einem mesoporösen trägermaterial zur herstellung von ethen aus methan - Google Patents

Reaktor mit einer plasmaquelle und einem katalysator mit einem mesoporösen trägermaterial zur herstellung von ethen aus methan Download PDF

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Publication number
EP3036034B1
EP3036034B1 EP14789610.4A EP14789610A EP3036034B1 EP 3036034 B1 EP3036034 B1 EP 3036034B1 EP 14789610 A EP14789610 A EP 14789610A EP 3036034 B1 EP3036034 B1 EP 3036034B1
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Prior art keywords
reactor
catalyst
plasma source
mesoporous
methane
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French (fr)
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EP3036034A1 (de
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Abduljelil ILIYAS
Mohamed Sabri Abdelghani
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Saudi Basic Industries Corp
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Saudi Basic Industries Corp
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
    • B01J19/087—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electric or magnetic energy
    • B01J19/088—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electric or magnetic energy giving rise to electric discharges
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
    • C01B3/02—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen
    • C01B3/22—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by decomposition of gaseous or liquid organic compounds
    • C01B3/24—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by decomposition of gaseous or liquid organic compounds of hydrocarbons
    • C01B3/26—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by decomposition of gaseous or liquid organic compounds of hydrocarbons using catalysts
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C2/00—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms
    • C07C2/76—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation of hydrocarbons with partial elimination of hydrogen
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C2/00—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms
    • C07C2/76—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation of hydrocarbons with partial elimination of hydrogen
    • C07C2/82—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation of hydrocarbons with partial elimination of hydrogen oxidative coupling
    • C07C2/84—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation of hydrocarbons with partial elimination of hydrogen oxidative coupling catalytic
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F110/00—Homopolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
    • C08F110/02—Ethene
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G50/00—Production of liquid hydrocarbon mixtures from lower carbon number hydrocarbons, e.g. by oligomerisation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
    • B01J2219/0803—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electric or magnetic energy
    • B01J2219/0805—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electric or magnetic energy giving rise to electric discharges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
    • B01J2219/0873—Materials to be treated
    • B01J2219/0875—Gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
    • B01J2219/0873—Materials to be treated
    • B01J2219/0892—Materials to be treated involving catalytically active material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
    • B01J2219/0894—Processes carried out in the presence of a plasma
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
    • B01J2219/0894—Processes carried out in the presence of a plasma
    • B01J2219/0896—Cold plasma
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
    • B01J2219/0894—Processes carried out in the presence of a plasma
    • B01J2219/0898—Hot plasma
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
    • C01B2203/10—Catalysts for performing the hydrogen forming reactions
    • C01B2203/1041—Composition of the catalyst
    • C01B2203/1047—Group VIII metal catalysts
    • C01B2203/1052—Nickel or cobalt catalysts
    • C01B2203/1058—Nickel catalysts
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
    • C01B2203/10—Catalysts for performing the hydrogen forming reactions
    • C01B2203/1041—Composition of the catalyst
    • C01B2203/1047—Group VIII metal catalysts
    • C01B2203/1064—Platinum group metal catalysts
    • C01B2203/107—Platinum catalysts
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
    • C01B2203/10—Catalysts for performing the hydrogen forming reactions
    • C01B2203/1041—Composition of the catalyst
    • C01B2203/1082—Composition of support materials
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
    • C01B2203/12—Feeding the process for making hydrogen or synthesis gas
    • C01B2203/1205—Composition of the feed
    • C01B2203/1211—Organic compounds or organic mixtures used in the process for making hydrogen or synthesis gas
    • C01B2203/1235—Hydrocarbons
    • C01B2203/1241—Natural gas or methane
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C2523/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00
    • C07C2523/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00 of noble metals
    • C07C2523/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00 of noble metals of the platinum group metals
    • C07C2523/44—Palladium
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C2529/00—Catalysts comprising molecular sieves
    • C07C2529/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites, pillared clays
    • C07C2529/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • C07C2529/70—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups C07C2529/08 - C07C2529/65
    • C07C2529/72—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups C07C2529/08 - C07C2529/65 containing iron group metals, noble metals or copper
    • C07C2529/74—Noble metals
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/50—Improvements relating to the production of bulk chemicals
    • Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts

Definitions

  • the invention relates to a reactor comprising a plasma source and a catalyst comprising a mesoporous support material.
  • the invention also relates to a process comprising feeding methane to said reactor in order to obtain one or more of ethene, hydrogen or carbon or downstream products derived from those products.
  • Ethene has for a long time been one of the most desirable substances derived from petrochemical fuels. Its use in the production of polythene and its derivatives contributes to its high economic value.
  • One route to the preparation of ethene is the cracking of higher petrochemical fractions containing more than 2 carbon atoms.
  • a further route to the preparation of ethene, which has for a long time been the subject of intense research, is from methane. The demand still remains in the state of the art for improved processes for the preparation of ethene from methane, especially for processes with low energy costs, long catalyst lifetimes, high yield and high production rate.
  • a reactor comprises, as reactor parts: a. a housing; and in said housing; b. a plasma source; and c. a catalyst, wherein said catalyst comprises as catalyst parts: i) a mesoporous support; ii) a metal selected from the group Pd, Ni, Ag or at least two thereof, wherein the metal is carried by said mesoporous support; wherein at least a part of said plasma source is located in said housing upstream of said catalyst.
  • a process for the preparation of a product selected from ethene and hydrogen or both comprises: i. feeding methane into a reactor according to any of the preceding claims; and ii. reacting the methane to furnish the product in the reactor.
  • the present invention is generally based on overcoming at least one of the problems encountered in the state of the art in relation to the reaction of methane to give at least one product selected from ethene, hydrogen and carbon, preferably ethene, or downstream products derived therefrom, preferably polythene or its derivatives.
  • the present invention is further based on providing a reactor and a process for a reaction which has a low energy cost, a high catalyst lifetime, a high overall efficiency, and a fast output rate.
  • Another desire is to provide an efficient and sustainable ethene source for producing downstream products and shaped bodies.
  • the mesoporous support has a d 50 value for pore diameter of about 2 to about 50 nanometers (nm), preferably about 10 to about 50 nm, more preferably about 20 to about 50 nm.
  • the mesoporous support is mesoporous silica.
  • the mesoporous support has a surface area to mass ratio of about 10 to about 1500 square meters per gram (m 2 /g), preferably about 500 to about 1200 m 2 /g, more preferably about 800 to about 1000 m 2 /g.
  • the metal in the catalyst is Pd.
  • the mesoporous support is selected from one of the following families: SBA-15 (commercially available from ACS materials), SBA-16 (commercially available from ACS materials), MCM-48 (commercially available from ACS materials), MCM-41 (commercially available from Sigma Aldrich), or a combination of at least two thereof, preferably SBA-15.
  • the catalyst comprises Pd supported on SBA-15, SBA-16, MCM-48, MCM-41, or a combination of at least two thereof, preferably Pd supported on SBA-15.
  • the mesoporous support is SBA-15.
  • a contribution to solving at least one of the problems disclosed herein is made by a process for the preparation of a product selected from ethene and hydrogen or both, preferably ethene, comprising:
  • a contribution to solving at least one of the problems disclosed herein is made by a product selected from the group consisting of ethene and hydrogen or both, obtained by a process according to the invention.
  • methane is fed to the reactor mixed with a carrier gas selected from the group consisting of N 2 , Ar, or He, or a combination of at least two thereof, preferably N 2 .
  • Preferred aspects of this embodiment correspond to the following combinations expressed as the letter combinations a, b, c, d, ab, ac, ad, bc, bd, cd, abc, abd, acd, bcd, or abcd.
  • a contribution to solving at least one of the problems disclosed herein is made by a process for the preparation of a downstream product comprising the following steps:
  • a contribution to solving at least one of the problems disclosed herein is made by a downstream product, preferably a polymer, preferably polythene or a derivative thereof, preferably in the form of a shaped body, obtained by a process according to the invention.
  • the downstream product is a polymer
  • the downstream product is a polythene.
  • the downstream product is converted into a shaped body.
  • a contribution to solving at least one of the problems disclosed herein is made by a reaction of methane to provide one or more products selected from the group consisting of carbon, ethene or hydrogen, preferably ethene.
  • Preferred reactions are those with a low energy cost, a high catalyst lifetime, high yield, in particular a high selectivity of desired products over by-products, and a fast output rate.
  • ethene is desired as a product and a high selectivity of ethene over other products, in particular ethene, ethane and carbon, is preferred.
  • carbon is desired as a product and it is preferred for the reaction to give a high selectivity of the specific form or forms of carbon, preferably carbon nanotubes, fullerenes or carbon nano-sheets, or a combination of at least two thereof.
  • both ethene and hydrogen are desired as products and these two products are separated from each other following their formation in the reactor.
  • Preferred plasma sources are devices which are capable of breaking at least one C-H bond in methane as part of the reaction according to the invention. It is further preferred for the selection of plasma source to contribute to advantageous characteristics of the reaction according to the invention.
  • Plasma sources are known to the skilled person. Any plasma source known to the skilled person and which he considers to be suitable in the context of the invention can be employed, such as non-thermal plasma, corona discharge, dielectric barrier discharge, microwave discharge and normal glow discharge.
  • Non-thermal plasma sources are preferred in the context of the invention, preferably those based on an AC discharge. In the context of non-thermal plasma sources, it is preferred for no heating of the reactant gas to occur before exposure to the plasma source.
  • the skilled person can adjust settings of the plasma source, such as frequency and voltage, in any way he sees fit, in order to increase favourable characteristics of the reaction according to the invention. It is particularly preferred in the context of the invention for the plasma source to draw a low specific power.
  • Useful information in this regard can be taken from the paper " Hydrogen Manufacturing Using Low Current, Non-thermal Plasma Boosted Fuel Converters" of L. Bromberg, D.R. Coh, A. Rabinovich and N. Alexeev, published in the Proceedings of the Symposium on ENERGY FOR THE 21ST CENTURY: HYDROGEN ENERGY, April 2001 San Diego, CA , which is incorporated in this patent application in its entirety.
  • the specific power consumption of the plasma source expressed as the electrical power drawn per unit mass of methane flowing into the reactor, is about 0.1 to about 30 kJ/g, or about 1 to about 20 kJ/g, or about 5 to about 15 kJ/g.
  • Preferred catalysts are those which catalyse the reaction according to the invention, particularly those which contribute to an increase in energy efficiency, an increase in reaction rate and/or an increase in yield/selectivity of products.
  • Preferred catalysts are those which are suited to catalysing the reaction according to the invention when provided as part of a reactor with a plasma source at least partially upstream of them.
  • the catalyst comprises a catalyst metal present on a mesoporous support material.
  • the ratio by weight of metal catalyst to mesoporous support material in the catalyst is about 1:10 to about 1:1000, or about 1:50 to about 1:500, or about 1:100 to about 1:200.
  • Preferred metals comprised by the catalyst according to the invention are those which catalyse the reaction according to the invention and contribute to advantageous characteristics of the reaction according to the invention.
  • catalyst metal refers to those substances which fulfil the above mentioned role of catalyst.
  • catalyst metal in addition to those materials consisting of a pure element which would traditionally be considered a metallic element, the term catalyst metal as used in this patent extends to other elements, alloys or mixtures of elements, or compounds, which fulfil the role of catalyst as described above. Catalyst metals are well known to the skilled person. Any catalyst metal which is known to the skilled person and which he considers to be suitable to be comprised in the catalyst according to the invention can be employed.
  • Preferred catalyst metals in the context of the invention are transitions metals, alloys comprising transition metals, or combinations of at least thereof.
  • Preferred transition metals in this context are Ni, Cu, Pd, Ag, Pt and Au, particularly preferably Ni, Ag or Pd or at least two thereof.
  • the preferred catalyst metal is Pd.
  • Preferred mesoporous supports according to the invention are those which, when used as support for the catalyst metal according to the invention, contribute to the catalysis of the reaction and to favourable characteristics of the reaction according to the invention.
  • Mesoporous support materials are well known to the skilled person and any mesoporous support material which he considers suitable in the context of the invention may be employed.
  • Preferred mesoporous support materials in the context of the invention have an average d 50 for pore size of about 2 to about 50 nm, preferably about 10 to about 50 nm, more preferably about 20 to about 50 nm. Pores in mesoporous materials are frequently anisotropic. In such a case, pore size is understood to mean the smallest dimension.
  • microporous is often used to refer to materials with a pore size of less than 2 nm. It is preferred according to the invention that the mesoporous material have a pore size equal to or greater than 2 nm. It is therefore preferred that the mesoporous material not be microporous.
  • macroporous is often used to refer to materials with a pore size greater than 50 nm. It is preferred according to the invention that the mesoporous material have a pore size equal to or less than 50 nm. It is therefore preferred that the mesoporous material not be macroporous.
  • Preferred mesoporous support materials in the context of the invention have a large specific surface area, preferably above about 100 m 2 /g, or above about 500 m 2 /g, or above about 800 m 2 /g. Values for specific surface area of above up to about 10,000 m 2 /g or less have been employed.
  • the mesoporous material can consist of any material known to the skilled person and which he considers to be suitable in the context of the invention, such as zeolites or silica.
  • the preferred mesoporous material is silica.
  • Mesoporous silica is well known to the skilled person and he can employ any mesoporous silica material which he deems suitable in the context of the invention.
  • Preferred mesoporous support materials are those with at least partial long-range ordering, which can be selected by the skilled person in order to achieve the desired advantageous properties of the catalyst system.
  • Preferred pore structures of the catalyst support materials can be 1d, 2d or 3d, this dimensionality expressing the number of special dimensions in which pores have a spatial extension of 1 ⁇ m or longer.
  • Structures which can be formed by channels in the mesoporous material can be, for example, linear parallel channels, laminas, 3d interconnected structures, 3d cages, single cages. Channels can be straight, curved, isolated, interconnected or connected by secondary interconnections.
  • mesoporous materials in particular with mesoporous silica, it is common to classify materials according to their characteristic long range ordering, this designation of long range ordering commonly neglecting local asymmetry, silica commonly being essentially amorphous locally on the pore walls.
  • Preferred mesoporous silica materials according to the invention are those of the M41S family. Some preferred long range symmetries are hexagonal or cubic.
  • MCM mesoporous silica
  • SBA SBA
  • MSU TUD
  • KSW FSM families
  • MCM-41 SBA-15
  • SBA-16 TUD-1
  • HMM-33 HMM-33
  • FSM-16 MCM-48
  • MCM-41 MCM-48
  • SBA-15 SBA-15
  • SBA-16 SBA-16
  • SBA-16 SBA-15
  • SBA-16 SBA-16, more preferably SBA-15.
  • mesoporous materials such as pore dimensions, channel length, channel thickness, channel breadth, or interstitial or integral impurities, can be tuned by the skilled person to bring about advantageous properties in the of the reaction according to the invention.
  • Syntheses for mesoporous materials are well known to the skilled person as are techniques for modifying macroscopic, microscopic and symmetry properties.
  • the skilled person may employ any technique he sees fit to tune the properties of the mesoporous material such as modifying the identity or proportions of reactants, modifying reaction conditions such as temperature or pressure, modifying surfactants used, particularly by modifying surfactant chain length, introducing impurities etc.
  • the catalyst metal may be introduced into the mesoporous support material in situ during the preparation of the mesoporous support material, or in a subsequent step, preferably in a subsequent step.
  • the metal catalyst is introduced in situ during the preparation of the mesoporous support material.
  • Such a procedure can include
  • the metal catalyst is introduced subsequent to the synthesis of the mesoporous support material. Such a procedure might look as follows.
  • Preferred reactors are flow reactors which facilitate the reaction according to the invention and particularly those which contribute to advantageous characteristics such as low energy cost, a high catalyst lifetime, high yield, in particular a high selectivity of ethene over ethene and other by-products, and a fast output rate.
  • Reactor configurations are well known to the skilled person and he may select characteristics of the reactor which he deems suitable in the context of the invention.
  • Preferred reactors according to the invention are those which comprise the following reactor components:
  • Reference to a housing in the context of the invention designates one or more components of the flow reactor situated in flow connection, preferably air-tight with an inlet and an outlet. This term is equally used in the context of the invention to refer to what could be identified as a single chamber or what might also be better identified as a number of interconnected modular chambers.
  • at least two reactor components are provided within a shared housing.
  • at least two modular housings are provided and connected via connectors.
  • Preferred plasma reactors are those which favour energy efficiency, high conversion rate and proportion of reactant into reactive species and eventually product and which allow a fast flow rate.
  • Preferred catalysis reactors are those which favour energy efficiency, high reaction yield, fast reaction rate and which allow for a fast flow rate. Arrangements of the catalysis reactor which maximise contact of reactants with the surface area of the catalyst are preferred, such as a tube packed with catalyst.
  • reactors according to the invention may comprise further reactor components which may be situated partially or entirely before or after the plasma source and/or the catalysts and/or each other so as to provide a partial or full overlap or no overlap. Further reactor components may be present as connected modular units, or together in a shared container with each other and/or the plasma source and catalyst. Some examples of preferred additional reactor components are given in the following embodiments.
  • the reactor further comprises one or more reactant source components, preferably situated at least partially, preferably entirely before the plasma source.
  • a reactant source component is present, the reactor considered as a whole facilitates a reaction starting from pre-reactants.
  • Preferred reactant sources might be those in which, for example, higher petrochemical fractions are cracked or another process is carried out which produces methane as a product or as a by-product, and/or a component which separates methane from a mixture.
  • the reactor further comprises one or more pre-treatment components, preferably situated at least partially, preferably entirely before the plasma source and preferably at least partially, preferably entirely after a reactant source if one is present.
  • Preferred pre-treatment components are those which, for example, remove unwanted ingredients in the reactant such as oxygen and/or water, introduce desirable constituents or carrier gases, or modify temperature, vibrational, rotational, electronic or other excitation state.
  • the reactor further comprises one or more measurement and/or analysis components.
  • Such components preferably serve to measure temperature, pressure, material proportion etc., and are preferably coupled to controls for other components in order to maximise reaction characteristics through feedback control.
  • the reactor further comprises one or more intermediate treatment components, preferably situated at least partially, preferably entirely, after the plasma source, and preferably at least partially, preferably entirely, before the catalyst.
  • an intermediate treatment component it preferably prepares the flow of material for the catalyst by removing impurities, particularly carbon and/or other materials which might impair and/or reduce the lifetime of the catalyst, or by modifying the temperature, pressure or other properties of the materials in order to bring about favourable conditions for the catalysis reaction.
  • the reactor comprises a carbon scrubber at least partially upstream of the catalyst.
  • the reactor further comprises one or more post-treatment and/or distillation components which are preferably situated at least partially, preferably entirely, downstream of the catalyst.
  • a post-treatment/distillation component it preferably removes undesired by-products and/or separates the desired products from each other.
  • the reactor further comprises one or more further downstream reactor components which are preferably situated at least partially, preferably entirely downstream of all of the above mentioned reactor components.
  • a further downstream reactor component it preferably facilitates the reaction of the products of the reaction according to the invention to provide downstream products such as polymers, preferably polythene or its derivatives, or hydrogenation products.
  • Preferred processes which may be carried out in the reactor according to the invention are those which provide at least one of ethene, carbon or hydrogen.
  • the skilled person is well versed in the many ways to improve chemical reactions and can make any amendments such as to the reaction conditions or to the reactants, in order to bring about advantageous properties of the reaction.
  • Temperatures for the reaction may be selected by the skilled person in order to improve advantageous characteristics of the reaction.
  • the temperature of reactants fed to the reactor and thus the temperature within the reactor are preferably suited to the catalyst employed, preferably a relatively low temperature.
  • the reactant material by fed into the reactor at a temperature of about 0 to about 200 °C or about 30 to about 180 °C, or about 50 to about 150 °C.
  • Absolute pressures within the reactor and for reactants at the point of entry into the reactor may be selected by the skilled person in order to improve advantageous characteristics of the reaction. In one embodiment, it is preferred according to the invention, for reasons of economy, for pressures close to atmospheric pressure to be employed in the reactor. In one embodiment, it is preferred for the average pressure in the reactor to be about 0.01 MPa to about 1.0 MPa (about 0.1 to about 10 atm.), or about 0.05 MPa to about 0.5 MPa (about 0.5 to about 5 atm.), or about 0.08 MPa to about 0.15 MPa (about 0.8 to about 1.5 atm.).
  • a carrier gas is employed, preferably one or more selected from the group consisting of argon, neon, nitrogen, or helium, preferably nitrogen.
  • Other constituents may be present as a mixture with the reactants in order to improve the reaction or for convenience.
  • the reactants are fed to the reactor in the form of natural gas.
  • the reactants comprises methane in an amount of about 70 to about 99 weight percent (wt. %), optionally ethane in an amount of about 0 to about 20 wt. %, optionally propane in an amount of about 0 to about 20 wt.
  • the reactant material have a low concentration of oxygen containing compounds, preferably less than 0.1 wt. %, or less than 0.01 wt. %, or less than 0.001 wt. %. Concentrations less than as low as 0.00001 wt. % or above have been employed. In one embodiment, it is preferred that the reactant material have a low concentration of oxygen, preferably less than 0.1 wt. %, or less than 0.01 wt. %, or less than 0.001 wt. %. Concentrations less than as low as 0.00001 wt. % or above have been employed.
  • the reactant material have a low concentration of water, preferably less than 0.1 wt. %, or less than 0.01 wt. %, or less than 0.001 wt. %. Concentrations less than as low as 0.00001 wt. % or above have been employed. In one embodiment, it is preferred that the content of methane in the reactants be high, preferably in an amount of about 50 to about 100 wt. %, or in an amount of about 80 to about 100 wt. %, or in an amount of about 95 to about 100 wt. %.
  • the process according to the invention for the preparation of ethene is coupled to further subsequent reactions in order to obtain downstream products.
  • Preferred downstream products are those obtained from polymerisation reactions, hydrogenation reactions, halogenation reactions, and other chemical functionalization reactions, preferably polymerisation reactions.
  • Preferred monomeric downstream products are vinyl chloride monomer (VCM), ethylene glycol monomer (MEG), ethylene oxide (EO), acrylonitrile, butadiene, styrene, vinyl acetate monomer (VAM).
  • Preferred oligomers are olefins, preferably linear olefins, preferably alpha olefins, preferably linear alpha olefins, such as 1-butene, 1-hexene, 1-octene, 1-decene, 1-dodecene, 1-tetradecene, 1-hexadecene or 1-octadecene.
  • Preferred polymerisation reactions can be mono-polymerization reactions or co-polymerization reactions.
  • Preferred polymerisation products are polythene, substituted polythene, polythene derivatives, polyvinyl chloride, polyethylene glycol (PEG), acrylonitrile butadiene styrene (ABS), polyvinyl acetate, poly olefins, preferably poly alpha olefins (PAO), styrene butadiene rubber (SBR), and other polymers comprising at least one of the above described monomers.
  • Preferred polymers are polythene or polythene derivatives.
  • Preferred forms of polythene and its derivatives are ultrahigh-molecular-weight polyethylene (UHMWPE), ultra-low-molecular-weight polyethylene (ULMWPE or PE-WAX), high-molecular-weight polyethylene (HMWPE), high-density polyethylene (HDPE), high-density cross-linked polyethylene (HDXLPE), cross-linked polyethylene (PEX or XLPE), medium-density polyethylene (MDPE), linear low-density polyethylene (LLDPE), low-density polyethylene (LDPE), or very-low-density polyethylene (VLDPE), chlorinated polyethylene (CPE), or combinations of at least two thereof, preferably HDPE, LLDPE or LDPE.
  • Preferred functionalization products are aromatic or non-aromatic compounds, saturated or unsaturated compounds, ketones, aldehydes, esters, amides, amines, carboxylic acids, alcohols etc.
  • the downstream products are further processed, particularly in the case where the downstream product is a polymer, particularly when it is polythene or a derivative thereof.
  • this further processing preferably involves formation of shaped objects such as plastic parts for electronic devices, automobile parts, such as bumpers, dashboards, or other body parts, furniture, or other parts or merchandise, or for packaging, such as plastic bags, film, or containers.
  • FIG. are merely schematic representations based on convenience and the ease of demonstrating the present disclosure, and are, therefore, not intended to indicate relative size and dimensions of the devices or components thereof and/or to define or limit the scope of the exemplary embodiments.
  • FIG. 1 shows a schematic view of a reactor 100 in which a number of reactor components 106 are provided in a single reactor housing 101.
  • reactor components 106 are a plasma source 309, preferably non-thermal plasma source
  • at least one of the reactor components 106 is a catalyst 310 comprising a catalyst metal, preferably Pd, on a mesoporous catalyst support material, preferably mesoporous silica, at least part of the plasma source 309 being situated upstream of the catalyst 310.
  • Reactants 102 enter the reactor via the reactor entrance 104 and the reaction material passes through each of the reactor components 106 before products 103 exit via the reactor exit 105.
  • the reactor housing 101 Apart from the reactor entrance 104 and the reactor exit 105, it is preferred for the reactor housing 101 to be airtight.
  • FIG. 2 shows a schematic view of a reactor 200 in which a number of modular reactor components 106 are provided in separate housings 207, connected in flow communication by connections 208.
  • three reactor components 106 have been shown and labelled generically as A, B and C.
  • at least one of the reactor components 106 is a plasma source 309, preferably non-thermal plasma source
  • at least one of the reactor components 106 is a catalyst 310 comprising a catalyst metal, preferably Pd, on a mesoporous catalyst support material, preferably mesoporous silica, the plasma source 309 being situated upstream of the catalyst 310.
  • Reactants 102 enter the reactor via the reactor entrance 104 and the reaction material passes through each of the reactor components 106 via the connections 208 before products 103 exit via the reactor exit 105.
  • the assembly of reactor housings 207 and connections 208 it is preferred for the assembly of reactor housings 207 and connections 208 to be airtight.
  • Figure 3 shows a schematic view of a reactor 300 in which there is at least partial overlap 311 between the plasma source 309 and the catalyst 310.
  • Reactants 102 enter the reactor housing 101 and reaction material passes through the plasma source 309 and then the catalyst 310 before products 103 leave the housing 101.
  • the spatial overlap 311 of the plasma source 309 and the catalyst 310 may be partial or complete.
  • Figure 4 shows a schematic view of a reactor 400 in which there is at no overlap between the plasma source 309 and the catalyst 310. For illustrative purposes, no further reactor components have been shown. Reactants 102 enter the reactor housing 101 and reaction material passes through the plasma source 309 and then the catalyst 310 before products 103 leave the housing 101.
  • FIG. 5 shows a schematic process flow 500 for the process according to the invention.
  • a number of optional reactor components 106 are included.
  • reactants 102 enter the reactor and reaction material passes through; an optional reactant source component 511, preferably a crude oil cracker; an optional a pre-treatment component 512, preferably a dehumidifier and oxygen scrubber; a plasma source 309, preferably a non-thermal plasma source; an optional intermediate treatment component 513, preferably a carbon scrubber; a catalyst 310 comprising a catalyst metal, preferably Pd, on a mesoporous catalyst support material, preferably mesoporous silica; an optional post-treatment component 514, preferably a distillation component; and an optional downstream processing component 515, preferably a polymerization reactor; before products 103, preferably ethene or polythene, exit the reactor.
  • an optional reactant source component 511 preferably a crude oil cracker
  • an optional a pre-treatment component 512
  • One or more individual optional components can be omitted, more than one from each type of component may be employed, or even further components not shown can be employed.
  • Options for providing reactor components in a single housing or as modules, and for providing at least partial, entire, or no overlap, are illustrated in the previous four figures. These options can also be combined.
  • FIG. 6 shows a schematic view of a plasma source 600 as employed in the examples.
  • Reactant 102 enters the plasma source 600 via an inlet 625 and is exposed to a discharge 621 between an electrode 624 and a ground electrode 622.
  • the electrode 624 is secured by insulators 620.
  • the reactive species 623 produced by the plasma source 600 exit via the outlet 626.
  • Figure 7 shows a process flow for an example preparation of a mesoporous support material with catalyst metal, in which the catalyst metal is introduced subsequent to the preparation of the mesoporous support material. The method is described in detail in example 1 below.
  • the average pore size was measured as the peak value on the pore size distribution (PAD), which was calculated from the adsorption branch as described above for specific surface area using the KJS (Ka-uk, Jaroniec, Sayari) method as described in M. Kruk, M. Jaroniec, A. Sayari, Langmuir, 13 (1997) 6267 .
  • KJS Ka-uk, Jaroniec, Sayari
  • a reactor was provided by connecting the following components in flow communication: a pressurised cylinder containing natural gas (greater than or equal to 99 % wt. % methane), purchased from Sigma Aldrich; a valve and pressure regulator provided with the gas cylinder, a flow rate meter, a plasma source apparatus as displayed schematically in Figure 6 , a 4 tube catalyst container packed with Pd supported on SBA-15 as prepared in Example 1, and an HP M200D gas chromatograph. Connections between the reactor parts were made using rubber tubing so as to be airtight. Pressure of the natural gas furnished from the regulator was modified so as to achieve a flow rate of 40 liters per minute (L/min).
  • the specific power consumption of the plasma source expressed as power consumption per unit weight of methane flow was calculated as 0.8 kW/g.
  • the plasma source was operated in AC mode with a frequency of 100 Hertz (Hz), and a voltage of 2000 Volts (V). Yield of ethene, hydrogen and by-products was measured at state of steady flow using the gas chromatograph.
  • Table 1 Mesoporous support materials employed Example Support d 90 pore size [nm] Specific surface area [m 2 /g] 2 SBA-15 (mesoporous) 7.6 530 Comparative Pentasil-zeolite (microporous) 0.55 85
  • Table 2 Reaction Yields Example Yield C 2 H 4 Yield C 2 H 2 Yield C 2 H 6 Yield H 2 Yield C 2 ++ - - ++ - Comparative O - - O -

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Claims (15)

  1. Ein Reaktor umfassend als Reaktorteile:
    a. ein Gehäuse; und in dem Gehäuse;
    b. eine Plasmaquelle; und
    c. einen Katalysator, worin der Katalysator als Katalysatorteile folgendes umfasst:
    i) einen mesoporösen Träger;
    ii) ein Metall gewählt aus der Gruppe Pd, Ni, Ag oder mindestens zwei davon, worin das Metall durch den genannten mesoporösen Träger getragen wird;
    worin mindestens ein Teil der genannten Plasmaquelle in dem Gehäuse stromaufwärts von dem Katalysator angeordnet ist.
  2. Der Reaktor gemäß Anspruch 1, worin der mesoporöse Träger einen d50 Wert für den Porendurchmesser von ungefähr 2 bis ungefähr 50 nm hat.
  3. Der Reaktor gemäß Anspruch 1 oder 2, worin der mesoporöse Träger mesoporöses Siliziumdioxid ist.
  4. Der Reaktor gemäß irgendeinem der vorhergehenden Ansprüche, worin der mesoporöse Träger ein Oberfläche-zu-MasseVerhältnis von ungefähr 10 bis ungefähr 1500 m2/g hat.
  5. Der Reaktor gemäß irgendeinem der vorhergehenden Ansprüche, worin das Metall in dem Katalysator Pd ist.
  6. Der Reaktor gemäß irgendeinem der vorhergehenden Ansprüche, worin der mesoporöse Träger gewählt ist aus einer der folgenden Familien: SBA-15, SBA-16, MCM-48, MCM-41 oder einer Kombination aus mindestens zweien davon.
  7. Der Reaktor gemäß irgendeinem der vorhergehenden Ansprüche, worin der Katalysator Pd getragen auf SBA-15, SBA-16, MCM-48, MCM-41 oder einer Kombination aus mindestens zweien davon umfasst, vorzugsweise worin der mesoporöse Träger SBA-15 ist.
  8. Der Reaktor gemäß irgendeinem der vorhergehenden Ansprüche, worin es zumindest eine teilweise räumliche Überlappung der Plasmaquelle und des Katalysators gibt.
  9. Der Reaktor gemäß irgendeinem der vorhergehenden Ansprüche, worin es keine räumliche Überlappung der Plasmaquelle und des Katalysators gibt.
  10. Ein Verfahren für die Herstellung eines Produkts gewählt aus Ethen und Wasserstoff oder beidem, das folgendes umfasst:
    i. Einspeisen von Methan in einen Reaktor gemäß irgendeinem der vorhergehenden Ansprüche; und
    ii. Reagieren des Methans, um das Produkt in dem Reaktor bereitzustellen.
  11. Das Verfahren gemäß Anspruch 10, worin Methan in den Reaktor eingespeist wird, gemischt mit einem Trägergas gewählt aus der Gruppe bestehend aus N2, Ar, oder He, oder einer Kombination aus mindestens zweien davon.
  12. Das Verfahren gemäß Anspruch 10 oder 11, worin mindestens eine der folgenden Bedingungen erfüllt ist:
    a. die maximale Temperatur innerhalb des Reaktors ist ungefähr 0 bis ungefähr 200°C;
    b. der Partialdruck von Methan, das in den Reaktor eingespeist wird, ist ungefähr 0,5 bis ungefähr 2 atm;
    c. die Leistungsdichte des Plasmaquellenausstoßes, ausgedrückt als die Leistung der Plasmaquelle geteilt durch die Durchflussrate des Methans, ist ungefähr 0,1 bis ungefähr 30 kJ/g;
    d. der Partialdruck des Trägergases ist ungefähr 0,1 bis ungefähr 10 atm.
  13. Ein Verfahren für die Herstellung eines stromabwärts-Produkts, das folgendes umfasst:
    i. Herstellung von Ethen durch ein Verfahren gemäß irgendeinem der Ansprüche 10 bis 12; und
    ii. Reaktion des Ethens, um das stromabwärts-Produkt zu bilden.
  14. Das Verfahren gemäß Anspruch 14, worin das stromabwärts-Produkt ein Polymer ist, vorzugsweise worin das stromabwärts-Produkt ein Polyethen ist.
  15. Das Verfahren gemäß irgendeinem der Ansprüche 13 bis 14, worin das stromabwärts-Produkt in einen geformten Körper umgewandelt wird.
EP14789610.4A 2013-08-23 2014-08-20 Reaktor mit einer plasmaquelle und einem katalysator mit einem mesoporösen trägermaterial zur herstellung von ethen aus methan Not-in-force EP3036034B1 (de)

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